121606305 has 16 divisors (see below), whose sum is σ = 194938944. Its totient is φ = 64733760.

The previous prime is 121606297. The next prime is 121606339. The reversal of 121606305 is 503606121.

It is not a de Polignac number, because 121606305 - 2³ = 121606297 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 795 + ... + 15615.

It is an arithmetic number, because the mean of its divisors is an integer number (12183684).

Almost surely, 2^121606305 is an apocalyptic number.

121606305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121606305 is a deficient number, since it is larger than the sum of its proper divisors (73332639).

121606305 is a wasteful number, since it uses less digits than its factorization.

121606305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15376.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 121606305 is about 11027.5248809513. The cubic root of 121606305 is about 495.4334943526.

The spelling of 121606305 in words is "one hundred twenty-one million, six hundred six thousand, three hundred five".